/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test07.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 16:17:38,802 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-18 16:17:38,828 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 16:17:38,829 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 16:17:38,830 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 16:17:38,832 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 16:17:38,833 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 16:17:38,834 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 16:17:38,835 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 16:17:38,836 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 16:17:38,837 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 16:17:38,837 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 16:17:38,839 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 16:17:38,840 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 16:17:38,841 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 16:17:38,841 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 16:17:38,843 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 16:17:38,845 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 16:17:38,846 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 16:17:38,847 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 16:17:38,849 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 16:17:38,849 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 16:17:38,852 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 16:17:38,859 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 16:17:38,860 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 16:17:38,861 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 16:17:38,862 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 16:17:38,898 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 16:17:38,907 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 16:17:38,908 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 16:17:38,908 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 16:17:38,909 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 16:17:38,909 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 16:17:38,909 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 16:17:38,909 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 16:17:38,909 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 16:17:38,910 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 16:17:38,910 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 16:17:38,910 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 16:17:38,910 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 16:17:38,910 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 16:17:38,910 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 16:17:38,911 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 16:17:38,911 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 16:17:38,911 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 16:17:38,911 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 16:17:38,911 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 16:17:38,914 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 16:17:38,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:17:38,914 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 16:17:38,914 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 16:17:38,914 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 16:17:38,915 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 16:17:38,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 16:17:38,915 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 16:17:38,915 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 16:17:38,916 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true [2020-08-18 16:17:39,207 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 16:17:39,218 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 16:17:39,222 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 16:17:39,223 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 16:17:39,224 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 16:17:39,226 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test07.c [2020-08-18 16:17:39,288 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/336e677f4/3045dcc062db4b40894367b4baa47617/FLAGee2bee8ec [2020-08-18 16:17:39,742 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 16:17:39,742 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test07.c [2020-08-18 16:17:39,748 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/336e677f4/3045dcc062db4b40894367b4baa47617/FLAGee2bee8ec [2020-08-18 16:17:40,178 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/336e677f4/3045dcc062db4b40894367b4baa47617 [2020-08-18 16:17:40,186 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 16:17:40,187 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 16:17:40,188 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 16:17:40,188 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 16:17:40,192 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 16:17:40,193 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:17:40" (1/1) ... [2020-08-18 16:17:40,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78323104 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:40, skipping insertion in model container [2020-08-18 16:17:40,196 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:17:40" (1/1) ... [2020-08-18 16:17:40,203 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 16:17:40,219 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 16:17:40,389 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:17:40,399 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 16:17:40,415 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:17:40,429 INFO L208 MainTranslator]: Completed translation [2020-08-18 16:17:40,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:40 WrapperNode [2020-08-18 16:17:40,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 16:17:40,431 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 16:17:40,431 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 16:17:40,431 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 16:17:40,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:40" (1/1) ... [2020-08-18 16:17:40,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:40" (1/1) ... [2020-08-18 16:17:40,525 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:40" (1/1) ... [2020-08-18 16:17:40,525 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:40" (1/1) ... [2020-08-18 16:17:40,535 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:40" (1/1) ... [2020-08-18 16:17:40,537 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:40" (1/1) ... [2020-08-18 16:17:40,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:40" (1/1) ... [2020-08-18 16:17:40,540 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 16:17:40,541 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 16:17:40,541 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 16:17:40,541 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 16:17:40,542 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:40" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:17:40,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 16:17:40,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 16:17:40,595 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-08-18 16:17:40,595 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 16:17:40,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 16:17:40,595 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-08-18 16:17:40,596 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 16:17:40,596 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 16:17:40,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 16:17:40,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 16:17:40,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 16:17:40,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 16:17:40,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 16:17:40,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 16:17:40,809 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 16:17:40,810 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 16:17:40,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:17:40 BoogieIcfgContainer [2020-08-18 16:17:40,814 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 16:17:40,815 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 16:17:40,815 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 16:17:40,818 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 16:17:40,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 04:17:40" (1/3) ... [2020-08-18 16:17:40,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@255984d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:17:40, skipping insertion in model container [2020-08-18 16:17:40,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:40" (2/3) ... [2020-08-18 16:17:40,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@255984d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:17:40, skipping insertion in model container [2020-08-18 16:17:40,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:17:40" (3/3) ... [2020-08-18 16:17:40,822 INFO L109 eAbstractionObserver]: Analyzing ICFG test07.c [2020-08-18 16:17:40,832 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 16:17:40,840 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 16:17:40,855 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 16:17:40,900 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 16:17:40,900 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 16:17:40,900 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 16:17:40,900 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 16:17:40,901 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 16:17:40,901 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 16:17:40,901 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 16:17:40,901 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 16:17:40,924 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-08-18 16:17:40,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 16:17:40,931 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:40,932 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:40,932 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:40,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:40,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1889415219, now seen corresponding path program 1 times [2020-08-18 16:17:40,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:40,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947968380] [2020-08-18 16:17:40,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:41,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:41,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:41,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:41,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:17:41,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:41,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:41,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947968380] [2020-08-18 16:17:41,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:41,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 16:17:41,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489548886] [2020-08-18 16:17:41,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 16:17:41,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:41,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 16:17:41,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-18 16:17:41,370 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 7 states. [2020-08-18 16:17:41,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:41,495 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2020-08-18 16:17:41,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 16:17:41,497 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-08-18 16:17:41,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:41,507 INFO L225 Difference]: With dead ends: 29 [2020-08-18 16:17:41,510 INFO L226 Difference]: Without dead ends: 15 [2020-08-18 16:17:41,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-18 16:17:41,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-08-18 16:17:41,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-08-18 16:17:41,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-08-18 16:17:41,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 14 transitions. [2020-08-18 16:17:41,553 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 14 transitions. Word has length 14 [2020-08-18 16:17:41,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:41,554 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 14 transitions. [2020-08-18 16:17:41,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 16:17:41,554 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 14 transitions. [2020-08-18 16:17:41,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 16:17:41,555 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:41,555 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:41,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 16:17:41,556 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:41,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:41,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1918044370, now seen corresponding path program 1 times [2020-08-18 16:17:41,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:41,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047205448] [2020-08-18 16:17:41,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:41,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:41,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:41,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:41,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:17:41,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:41,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:41,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047205448] [2020-08-18 16:17:41,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:41,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 16:17:41,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707673594] [2020-08-18 16:17:41,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 16:17:41,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:41,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 16:17:41,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 16:17:41,802 INFO L87 Difference]: Start difference. First operand 15 states and 14 transitions. Second operand 8 states. [2020-08-18 16:17:42,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:42,065 INFO L93 Difference]: Finished difference Result 15 states and 14 transitions. [2020-08-18 16:17:42,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 16:17:42,066 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-08-18 16:17:42,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:42,067 INFO L225 Difference]: With dead ends: 15 [2020-08-18 16:17:42,067 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 16:17:42,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-08-18 16:17:42,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 16:17:42,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 16:17:42,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 16:17:42,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 16:17:42,070 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2020-08-18 16:17:42,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:42,070 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 16:17:42,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 16:17:42,071 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 16:17:42,071 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 16:17:42,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 16:17:42,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 16:17:42,266 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-18 16:17:42,266 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~p2~0.base |old(~p2~0.base)|) (= |~#b~0.offset| |old(~#b~0.offset)|) (= |old(#length)| |#length|) (= |~#a~0.offset| |old(~#a~0.offset)|) (= ~p2~0.offset |old(~p2~0.offset)|) (= |~#b~0.base| |old(~#b~0.base)|) (= |#NULL.base| |old(#NULL.base)|) (= ~p1~0.offset |old(~p1~0.offset)|) (= ~p1~0.base |old(~p1~0.base)|) (= |~#a~0.base| |old(~#a~0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-08-18 16:17:42,267 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 16:17:42,267 INFO L268 CegarLoopResult]: For program point L9(lines 9 14) no Hoare annotation was computed. [2020-08-18 16:17:42,267 INFO L268 CegarLoopResult]: For program point fEXIT(lines 7 15) no Hoare annotation was computed. [2020-08-18 16:17:42,267 INFO L264 CegarLoopResult]: At program point fENTRY(lines 7 15) the Hoare annotation is: (or (not (= |old(~p1~0.offset)| |~#a~0.offset|)) (not (= (select (select |#memory_int| ~p2~0.base) ~p2~0.offset) 1)) (and (= ~p1~0.offset |~#a~0.offset|) (= |old(~p1~0.base)| ~p1~0.base)) (not (= |old(~p1~0.base)| |~#a~0.base|)) (= |~#b~0.base| |~#a~0.base|)) [2020-08-18 16:17:42,267 INFO L268 CegarLoopResult]: For program point fFINAL(lines 7 15) no Hoare annotation was computed. [2020-08-18 16:17:42,268 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 16:17:42,268 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (not (= |~#b~0.base| |~#a~0.base|)) [2020-08-18 16:17:42,268 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 16:17:42,268 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 16:17:42,269 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 35) no Hoare annotation was computed. [2020-08-18 16:17:42,269 INFO L264 CegarLoopResult]: At program point L30(lines 17 37) the Hoare annotation is: (= |~#a~0.base| |~#b~0.base|) [2020-08-18 16:17:42,269 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 17 37) the Hoare annotation is: (or (and (= ~p2~0.base |old(~p2~0.base)|) (= |old(~p2~0.offset)| ~p2~0.offset) (= |old(~p1~0.offset)| ~p1~0.offset) (= |old(~p1~0.base)| ~p1~0.base)) (= |~#b~0.base| |~#a~0.base|)) [2020-08-18 16:17:42,269 INFO L268 CegarLoopResult]: For program point L29(lines 29 31) no Hoare annotation was computed. [2020-08-18 16:17:42,269 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 17 37) no Hoare annotation was computed. [2020-08-18 16:17:42,270 INFO L264 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (or (and (= |~#a~0.base| ~p1~0.base) (= ~p1~0.offset |~#a~0.offset|) (= (select (select |#memory_int| ~p2~0.base) ~p2~0.offset) 1)) (= |~#b~0.base| |~#a~0.base|)) [2020-08-18 16:17:42,270 INFO L268 CegarLoopResult]: For program point L27-1(line 27) no Hoare annotation was computed. [2020-08-18 16:17:42,270 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 17 37) no Hoare annotation was computed. [2020-08-18 16:17:42,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 04:17:42 BoogieIcfgContainer [2020-08-18 16:17:42,288 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 16:17:42,291 INFO L168 Benchmark]: Toolchain (without parser) took 2102.43 ms. Allocated memory was 138.9 MB in the beginning and 233.8 MB in the end (delta: 94.9 MB). Free memory was 101.8 MB in the beginning and 145.6 MB in the end (delta: -43.8 MB). Peak memory consumption was 51.1 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:42,292 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 16:17:42,293 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.19 ms. Allocated memory is still 138.9 MB. Free memory was 101.6 MB in the beginning and 91.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:42,294 INFO L168 Benchmark]: Boogie Preprocessor took 109.72 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 91.8 MB in the beginning and 179.4 MB in the end (delta: -87.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:42,295 INFO L168 Benchmark]: RCFGBuilder took 272.98 ms. Allocated memory is still 201.9 MB. Free memory was 179.4 MB in the beginning and 165.0 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:42,296 INFO L168 Benchmark]: TraceAbstraction took 1472.79 ms. Allocated memory was 201.9 MB in the beginning and 233.8 MB in the end (delta: 32.0 MB). Free memory was 164.3 MB in the beginning and 145.6 MB in the end (delta: 18.7 MB). Peak memory consumption was 50.7 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:42,300 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 242.19 ms. Allocated memory is still 138.9 MB. Free memory was 101.6 MB in the beginning and 91.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.72 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 91.8 MB in the beginning and 179.4 MB in the end (delta: -87.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 272.98 ms. Allocated memory is still 201.9 MB. Free memory was 179.4 MB in the beginning and 165.0 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1472.79 ms. Allocated memory was 201.9 MB in the beginning and 233.8 MB in the end (delta: 32.0 MB). Free memory was 164.3 MB in the beginning and 145.6 MB in the end (delta: 18.7 MB). Peak memory consumption was 50.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 35]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: a == b - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 20 SDtfs, 6 SDslu, 48 SDs, 0 SdLazy, 80 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 7 NumberOfFragments, 107 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 79 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 26 ConstructedInterpolants, 0 QuantifiedInterpolants, 3224 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...